Question

Classify the chemical equations as being balanced or not balanced. CaO + 3C → CaC2 + CONa + H2O → 2NaOH + H24Fe + O2 → 2Fe2O32Mg + O2 → 2MgO

Answer 1

CaO + 3C → CaC₂ + CO balanced
Na + H₂O → 2NaOH + H₂ not balanced
4Fe + O₂ → 2Fe₂O₃ not balanced
2Mg + O₂ → 2MgO balanced

Answer 2

Answer : The balanced chemical reaction is,
`CaO+3C\rightarrow CaC_2+CO`

Explanation :

Balanced chemical reaction : It is defined as the number of atoms of individual elements present on reactant side must be equal to the product side.

The given unbalanced chemical reactions are,

`Na+H_2O\rightarrow 2NaOH+H_2`

`4Fe+O_2\rightarrow 2Fe_2O_3+CO`

`2Mg+O_2\rightarrow 2MgO`

These chemical reactions are unbalanced reactions because in this reaction, the number of atoms of individual elements present on reactant side are not equal to the product side.

From the given options we conclude that, the balanced chemical reaction will be,

`CaO+3C\rightarrow CaC_2+CO`